| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20080802100213.GB14757@wotan.suse.de>
Date: Sat, 2 Aug 2008 12:02:13 +0200
From: Nick Piggin <npiggin@...e.de>
To: Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Memory Management List <linux-mm@...ck.org>
Subject: [patch] convert test_set_buffer_locked to trylock_buffer
fs: rename buffer trylock
Like the page lock change, this also requires name change, so convert the
raw test_and_set bitop to a trylock.
Signed-off-by: Nick Piggin <npiggin@...e.de>
---
fs/buffer.c | 4 ++--
fs/jbd/commit.c | 2 +-
fs/ntfs/aops.c | 2 +-
fs/ntfs/compress.c | 2 +-
fs/ntfs/mft.c | 4 ++--
fs/reiserfs/inode.c | 2 +-
fs/reiserfs/journal.c | 4 ++--
fs/xfs/linux-2.6/xfs_aops.c | 2 +-
include/linux/buffer_head.h | 8 ++++++--
9 files changed, 17 insertions(+), 13 deletions(-)
Index: linux-2.6/fs/jbd/commit.c
===================================================================
--- linux-2.6.orig/fs/jbd/commit.c
+++ linux-2.6/fs/jbd/commit.c
@@ -221,7 +221,7 @@ write_out_data:
* blocking lock_buffer().
*/
if (buffer_dirty(bh)) {
- if (test_set_buffer_locked(bh)) {
+ if (!trylock_buffer(bh)) {
BUFFER_TRACE(bh, "needs blocking lock");
spin_unlock(&journal->j_list_lock);
/* Write out all data to prevent deadlocks */
Index: linux-2.6/fs/buffer.c
===================================================================
--- linux-2.6.orig/fs/buffer.c
+++ linux-2.6/fs/buffer.c
@@ -1720,7 +1720,7 @@ static int __block_write_full_page(struc
*/
if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
lock_buffer(bh);
- } else if (test_set_buffer_locked(bh)) {
+ } else if (!trylock_buffer(bh)) {
redirty_page_for_writepage(wbc, page);
continue;
}
@@ -3000,7 +3000,7 @@ void ll_rw_block(int rw, int nr, struct
if (rw == SWRITE || rw == SWRITE_SYNC)
lock_buffer(bh);
- else if (test_set_buffer_locked(bh))
+ else if (!trylock_buffer(bh))
continue;
if (rw == WRITE || rw == SWRITE || rw == SWRITE_SYNC) {
Index: linux-2.6/include/linux/buffer_head.h
===================================================================
--- linux-2.6.orig/include/linux/buffer_head.h
+++ linux-2.6/include/linux/buffer_head.h
@@ -115,7 +115,6 @@ BUFFER_FNS(Uptodate, uptodate)
BUFFER_FNS(Dirty, dirty)
TAS_BUFFER_FNS(Dirty, dirty)
BUFFER_FNS(Lock, locked)
-TAS_BUFFER_FNS(Lock, locked)
BUFFER_FNS(Req, req)
TAS_BUFFER_FNS(Req, req)
BUFFER_FNS(Mapped, mapped)
@@ -321,10 +320,15 @@ static inline void wait_on_buffer(struct
__wait_on_buffer(bh);
}
+static inline int trylock_buffer(struct buffer_head *bh)
+{
+ return likely(!test_and_set_bit(BH_Lock, &bh->b_state));
+}
+
static inline void lock_buffer(struct buffer_head *bh)
{
might_sleep();
- if (test_set_buffer_locked(bh))
+ if (!trylock_buffer(bh))
__lock_buffer(bh);
}
Index: linux-2.6/fs/ntfs/aops.c
===================================================================
--- linux-2.6.orig/fs/ntfs/aops.c
+++ linux-2.6/fs/ntfs/aops.c
@@ -1194,7 +1194,7 @@ lock_retry_remap:
tbh = bhs[i];
if (!tbh)
continue;
- if (unlikely(test_set_buffer_locked(tbh)))
+ if (!trylock_buffer(tbh))
BUG();
/* The buffer dirty state is now irrelevant, just clean it. */
clear_buffer_dirty(tbh);
Index: linux-2.6/fs/ntfs/compress.c
===================================================================
--- linux-2.6.orig/fs/ntfs/compress.c
+++ linux-2.6/fs/ntfs/compress.c
@@ -665,7 +665,7 @@ lock_retry_remap:
for (i = 0; i < nr_bhs; i++) {
struct buffer_head *tbh = bhs[i];
- if (unlikely(test_set_buffer_locked(tbh)))
+ if (!trylock_buffer(tbh))
continue;
if (unlikely(buffer_uptodate(tbh))) {
unlock_buffer(tbh);
Index: linux-2.6/fs/ntfs/mft.c
===================================================================
--- linux-2.6.orig/fs/ntfs/mft.c
+++ linux-2.6/fs/ntfs/mft.c
@@ -586,7 +586,7 @@ int ntfs_sync_mft_mirror(ntfs_volume *vo
for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
struct buffer_head *tbh = bhs[i_bhs];
- if (unlikely(test_set_buffer_locked(tbh)))
+ if (!trylock_buffer(tbh))
BUG();
BUG_ON(!buffer_uptodate(tbh));
clear_buffer_dirty(tbh);
@@ -779,7 +779,7 @@ int write_mft_record_nolock(ntfs_inode *
for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
struct buffer_head *tbh = bhs[i_bhs];
- if (unlikely(test_set_buffer_locked(tbh)))
+ if (!trylock_buffer(tbh))
BUG();
BUG_ON(!buffer_uptodate(tbh));
clear_buffer_dirty(tbh);
Index: linux-2.6/fs/reiserfs/inode.c
===================================================================
--- linux-2.6.orig/fs/reiserfs/inode.c
+++ linux-2.6/fs/reiserfs/inode.c
@@ -2435,7 +2435,7 @@ static int reiserfs_write_full_page(stru
if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
lock_buffer(bh);
} else {
- if (test_set_buffer_locked(bh)) {
+ if (!trylock_buffer(bh)) {
redirty_page_for_writepage(wbc, page);
continue;
}
Index: linux-2.6/fs/reiserfs/journal.c
===================================================================
--- linux-2.6.orig/fs/reiserfs/journal.c
+++ linux-2.6/fs/reiserfs/journal.c
@@ -855,7 +855,7 @@ static int write_ordered_buffers(spinloc
jh = JH_ENTRY(list->next);
bh = jh->bh;
get_bh(bh);
- if (test_set_buffer_locked(bh)) {
+ if (!trylock_buffer(bh)) {
if (!buffer_dirty(bh)) {
list_move(&jh->list, &tmp);
goto loop_next;
@@ -3871,7 +3871,7 @@ int reiserfs_prepare_for_journal(struct
{
PROC_INFO_INC(p_s_sb, journal.prepare);
- if (test_set_buffer_locked(bh)) {
+ if (!trylock_buffer(bh)) {
if (!wait)
return 0;
lock_buffer(bh);
Index: linux-2.6/fs/xfs/linux-2.6/xfs_aops.c
===================================================================
--- linux-2.6.orig/fs/xfs/linux-2.6/xfs_aops.c
+++ linux-2.6/fs/xfs/linux-2.6/xfs_aops.c
@@ -1104,7 +1104,7 @@ xfs_page_state_convert(
* that we are writing into for the first time.
*/
type = IOMAP_NEW;
- if (!test_and_set_bit(BH_Lock, &bh->b_state)) {
+ if (trylock_buffer(bh)) {
ASSERT(buffer_mapped(bh));
if (iomap_valid)
all_bh = 1;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists